Has anyone ever used these din rail manual transfer switches?

[aussiesam]

I'm looking for a transfer switch and found these on amazon, link to the product (not affiliated) .. they are dirt cheap, sell for about $15-$20 and offer a very simple transfer switch mechanism, lift left side up and right side goes down and vice versa. I'm wondering if they can be considered safe if installed with other breakers. Has anyone ever used these types or why not? Any feedback would be appreciated

 

[Zwy]

The problem with that dual breaker transfer switch is an interlock does not exist.

Feeding power from 2 sources that are not in phase will result in system failure and not a pretty failure as that. An interlock is designed so power can not be from 2 sources at the same time that are out of phase. You could fabricate one with the right enclosure but really, you can buy a cheap 100A breaker panel and an interlock kit with a backfed breaker and hold down kit and have the same function that would be UL listed.

 

[zanydroid]

How does the UL listed version of this from Growatt do better? (The one in their ATS-US)

I know that there are contractors that can be mechanically or electronically interlocked to each other. I believe the growatt at least does an electronic interlock of the contactors in there by flipping the pair of two pole contactors from the same coil drive signal.

In the picture shown I don’t see interlocks on the breaker handles (which I don’t think are enough) and it’s not clear they have the accoutrement to be tied via special mechanical connecting rods

 

[Q-Dog]

They claim an internal interlock.

 

[Zwy]

How does the UL listed version of this from Growatt do better? (The one in their ATS-US)

I know that there are contractors that can be mechanically or electronically interlocked to each other. I believe the growatt at least does an electronic interlock of the contactors in there by flipping the pair of two pole contactors from the same coil drive signal.

When a AIO inverter is used with grid backup, in order to function as a UPS with quick switching time, the AIO inverter will draw power from the grid and sync to the phase of grid power. This is why you see that 200W draw on many inverters.

The reason an automatic or manual transfer switch has a delay on switch time is so there can't possibly be 2 sources out of phase.

In the case of the Growatt ATS-US, it has an internal transformer and is basically a UPS.

 

[Mattb4]

There is also the style that are not breakers but a real transfer switch. I used these for my transfer control box.

 

[Zwy]

They claim an internal interlock.View attachment 215307

If there is an internal interlock and the loads are below the rated current, then it will work.

 

[littleharbor2]

I've used a number of these auto/manual transfer switches recently. They work quite well.

TOP 110V 2P 63A Dual Power Automatic Transfer Switch Generator Changeover Switch | eBay

Specifications: ATS Level: CB level Use Level: AC-33iB Total Size: About 150×137×118mm (1mm=0.0393Inches) Line Voltage: AC110V Line Current: 6A-63A Operating Frequency: 60HZ Insulation Voltage: AC110V Conversion Time: 2S or so Conversion Mode: self cast Display Function: Indicator light display...

www.ebay.com

 

[Zwy]

They claim an internal interlock.View attachment 215307

Where did you find the diagram? I looked for the manual but only find used DZ47NS-63 C50 for sale on ebay. Have to wonder why these are being sold used?

 

[Q-Dog]

Where did you find the diagram? I looked for the manual but only find used DZ47NS-63 C50 for sale on ebay. Have to wonder why these are being sold used?

It is on the amazone sale page, link in the first post.

 

[Mahendra Gomanie]

I am using the Midnite solar version works pretty great.

https://www.amazon.com/MidNite-Solar-MNTRANSFER-Transfer-Switch/dp/B07QGX5P58

 

[aussiesam]

I am using the Midnite solar version works pretty great.

https://www.amazon.com/MidNite-Solar-MNTRANSFER-Transfer-Switch/dp/B07QGX5P58

That's an interesting construction. I have been looking for an interlock for MCB type/din rail breakers and yours is the first i've seen so far, but mounting one upside down could get a bit confusing. I feel like I might get confused one day, forget which side is off and then you better be sure there is 0 leeway on that mechanism

 

[Zwy]

It is on the amazone sale page, link in the first post.

I see it now, the blue doesn't always stand out and with just 4 letters I missed it. Thanks.

 

[zanydroid]

.

 

[aussiesam]

I've used a number of these auto/manual transfer switches recently. They work quite well.

I like their marketing material. Fire truck, atm, hotel room.

 

[Zwy]

I like their marketing material. Fire truck, atm, hotel room.

Fire truck comes for your house that burned down, you go to the ATM for money to pay for the motel room?

It is nice they put the photos in order.

 

[MajicDiver]

View attachment 214930 View attachment 214931
I'm looking for a transfer switch and found these on amazon, link to the product (not affiliated) .. they are dirt cheap, sell for about $15-$20 and offer a very simple transfer switch mechanism, lift left side up and right side goes down and vice versa. I'm wondering if they can be considered safe if installed with other breakers. Has anyone ever used these types or why not? Any feedback would be appreciated

I have one I plan to install eventually. It absolutely does have an internal interlock that works, I’ve tested it. It’s impossible to close both at same time - I’ve tried every way possible. Of course it is not UL.

 

[Brucey]

I like their marketing material. Fire truck, atm, hotel room.

I'd like to think that's them promising to reimburse your hotel expenses while your house is rebuilt after the fire their switch causes.

 

[solarsimon]

I use these in the UK. I think FuseBox is a UK manufacturer. They hold significant market share here & are considered decent.




00

 

[Texas-Mark]

I've used a number of these auto/manual transfer switches recently. They work quite well.

TOP 110V 2P 63A Dual Power Automatic Transfer Switch Generator Changeover Switch | eBay

Specifications: ATS Level: CB level Use Level: AC-33iB Total Size: About 150×137×118mm (1mm=0.0393Inches) Line Voltage: AC110V Line Current: 6A-63A Operating Frequency: 60HZ Insulation Voltage: AC110V Conversion Time: 2S or so Conversion Mode: self cast Display Function: Indicator light display...

www.ebay.com

I've used those before and had zero issues. The only thing is I had to reverse inputs to get the results I desired. I wanted it to fall back to the grid when my inverter was down.